1970•Applied OpticsRequires access

Vacuum Grating Spectrometer for the Mid and Far Infrared

A. R. H. Cole, A. A. Green, G.A. Osborne, G. D. Reece

Abstract

The construction and performance of a single beam large aperture spectrometer totally enclosed in a vacuum chamber are described. The focal length of the Czerny-Turner monochromator is 90 cm and plane gratings up to 23 cm x 18 cm are used. The grating drive incorporates a Merton nut. With a Golay detector, the resolution achieved is about 0.12 cm(-1) at 1000 cm(-1), 0.20-0.30 cm(-1) in the range 300-27 cm(-1) Illustrative spectra of ammonia, water vapor, and glyoxal are given.

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Key concepts: Monochromator, Optics, Spectrometer, Grating, Spectral resolution, Aperture (computer memory), Materials science, Detector